Method and apparatus for transmitting and receiving data channels in wireless communication system

ABSTRACT

The present disclosure relates to a communication technique for fusing, with an IoT technology, a 5G communication system for supporting a higher data transmission rate than a 4G system, and a system therefor. The present disclosure may be applied to intelligent services, such as smart homes, smart buildings, smart cities, smart cars or connected cars, health care, digital education, retail, and security and safety related services, on the basis of 5G communication technologies and IoT-related technologies. A method of a terminal according to an embodiment of the present invention comprises: receiving an indicator for changing a bandwidth from a base station; identifying whether there is a signal to be transmitted on the changed bandwidth at a time of transmitting hybrid automatic repeat request (HARQ) ACK information for data received on a secondary cell (SCell) from the base station; and multiplexing and transmitting the signal and the HARQ ACK information in case that there is a signal to be transmitted in the changed bandwidth.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a 371 of International Application No.PCT/KR2019/002028 filed on Feb. 20, 2019, which claims priority toKorean Patent Application No. 10-2018-0022216 filed on Feb. 23, 2018,the disclosures of which are herein incorporated by reference in theirentirety.

FIELD

The disclosure relates to a method and an apparatus for transmitting orreceiving data through a data channel in a wireless communicationsystem.

DESCRIPTION OF RELATED ART

To meet the demand for wireless data traffic having increased sincedeployment of 4G communication systems, efforts have been made todevelop an improved 5G or pre-5G communication system. Therefore, the 5Gor pre-5G communication system is also called a “Beyond 4G Network” or a“Post LTE System”. The 5G communication system is considered to beimplemented in higher frequency (mmWave) bands, e.g., 60 GHz bands, soas to accomplish higher data rates. To decrease propagation loss of theradio waves and increase the transmission distance, the beamforming,massive multiple-input multiple-output (MIMO), full dimensional MIMO(FD-MIMO), array antenna, an analog beam forming, large scale antennatechniques are discussed in 5G communication systems. In addition, in 5Gcommunication systems, development for system network improvement isunder way based on advanced small cells, cloud radio access networks(RANs), ultra-dense networks, device-to-device (D2D) communication,wireless backhaul, moving network, cooperative communication,coordinated multi-points (CoMP), reception-end interference cancellationand the like. In the 5G system, hybrid FSK and QAM modulation (FQAM) andsliding window superposition coding (SWSC) as an advanced codingmodulation (ACM), and filter bank multi carrier (FBMC), non-orthogonalmultiple access (NOMA), and sparse code multiple access (SCMA) as anadvanced access technology have also been developed.

The Internet, which is a human centered connectivity network wherehumans generate and consume information, is now evolving to the Internetof things (IoT) where distributed entities, such as things, exchange andprocess information without human intervention. The Internet ofeverything (IoE), which is a combination of the IoT technology and thebig data processing technology through connection with a cloud server,has emerged. As technology elements, such as “sensing technology”,“wired/wireless communication and network infrastructure”, “serviceinterface technology”, and “security technology” have been demanded forIoT implementation, a sensor network, a machine-to-machine (M2M)communication, machine type communication (MTC), and so forth have beenrecently researched. Such an IoT environment may provide intelligentInternet technology services that create a new value to human life bycollecting and analyzing data generated among connected things. IoT maybe applied to a variety of fields including smart home, smart building,smart city, smart car or connected cars, smart grid, health care, smartappliances and advanced medical services through convergence andcombination between existing information technology (IT) and variousindustrial applications.

In line with this, various attempts have been made to apply 5Gcommunication systems to IoT networks. For example, technologies such asa sensor network, machine type communication (MTC), andmachine-to-machine (M2M) communication may be implemented bybeamforming, MIMO, and array antennas. Application of a cloud radioaccess network (RAN) as the above-described big data processingtechnology may also be considered an example of convergence of the 5Gtechnology with the IoT technology.

In 5G, the base station may configure, in a terminal, specific time andfrequency resources as rate-matching resources (RMRs) for variousobjectives, and may perform rate matching for the configuredrate-matching resource part to transmit or receive a data channel. Thebase station may configure, in the terminal, time and frequency resourcedomains for the rate-matching resource and a period in which acorresponding rate-matching resource occurs via higher layer signaling.Accordingly, one or a plurality of rate-matching resources may begrouped and configured as a resource set group, and the base station maydynamically indicate whether rate matching for a data channel isperformed in a rate-matching resource part, which is configured as therate-matching group, through downlink control information (DCI).

Here, in the situation in which rate-matching resources having differentperiod information are grouped and indicated by one DCI bit, a method ofdetermining whether or not rate matching is performed in eachrate-matching resource is required. The disclosure may include a methodof considering all individual periods of rate-matching resources in arate-matching group, a method of considering a period having the minimumvalue (or the greatest common factor) among the periods in therate-matching group, a method of considering a period for each slot, andthe like.

Meanwhile, in 5G, the base station may configure one or multiplebandwidth parts (BWP) for the terminal, and may dynamically change aspecific bandwidth part through DCI.

Here, between the time point at which the terminal receives data througha PDSCH and the time point at which the terminal transmits a hybridautomatic repeat request (HARQ)-acknowledgement (ACK) for the data, achange in the UL bandwidth in which the HARQ-ACK needs to be transmittedmay occur.

The disclosure proposes a method for transmitting a HARQ-ACK for data,which is received through a PDSCH in consideration of carrieraggregation. According to the disclosure, in the situation in which anHARQ-ACK for a scheduled PDSCH in an Scell is transmitted in a UL BWP ofa Pcell, if the time point at which an HARQ-ACK for a PDSCH scheduled inthe Pcell is transmitted or a PUSCH scheduled in the Pcell istransmitted is the same as the time point at which the HARQ-ACK for theScell is transmitted, the Scell PDSCH HARQ-ACK may be transmittedthrough the changed UL BWP of the Pcell.

SUMMARY

In order to solve the problem described above, a method by a terminalaccording to the disclosure includes: receiving an indicator forswitching a bandwidth part from a base station; identifying whether asignal to be transmitted on a switched bandwidth part exists at a timepoint at which hybrid automatic repeat request (HARQ) ACK informationfor data, which has been received from the base station on a secondarycell (SCell), is transmitted; and in case that a signal to betransmitted on the switched bandwidth part exists, multiplexing andtransmitting the signal and the HARQ ACK information.

In order to solve the problem described above, a method by a basestation according to the disclosure includes: transmitting an indicatorfor changing a bandwidth part to a terminal; and in case that a signalto be received through the changed bandwidth part exists at a time pointat which hybrid automatic repeat request (HARQ) ACK information fordata, which has been transmitted to the terminal through a secondarycell (SCell), is received, receiving the HARQ ACK informationmultiplexed with the signal.

In order to solve the problem described above, a terminal according tothe disclosure includes: a transceiver, and a controller configured to:receive an indicator for changing a bandwidth part from a base station;identify whether a signal to be transmitted through the changedbandwidth part exists at a time point at which hybrid automatic repeatrequest (HARQ) ACK information for data, which has been received througha secondary cell (SCell) from the base station, is transmitted; and incase that a signal to be transmitted through the changed bandwidth partexists, multiplex and transmit the signal and the HARQ ACK information.

In order to solve the problem described above, a base station accordingto the disclosure includes: a transceiver, and a controller configuredto: transmit an indicator for changing a bandwidth part to a terminal;and in case that a signal to be received through the changed bandwidthpart exists at a time point at which hybrid automatic repeat request(HARQ) ACK information for data, which has been transmitted to theterminal through a secondary cell (SCell), is received, receive the HARQACK information multiplexed with the signal.

According to a method for transmitting and receiving signals through adownlink control channel and a data channel, proposed in the disclosure,it is possible to reduce the channel estimation complexity of aterminal, enable easy buffer management, and utilize radio resourcesmore efficiently.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 illustrates the basic structure of a time-frequency domain in 5G;

FIG. 2 illustrates an example of rate matching for a data channel in 5G;

FIG. 3 illustrates an example of multi-slot scheduling for a datachannel in 5G;

FIG. 4 illustrates an example of the configuration of a bandwidth partin 5G;

FIG. 5 illustrates an example of a rate-matching operation according toan embodiment of the disclosure;

FIG. 6 illustrates another example of a rate-matching operationaccording to an embodiment of the disclosure;

FIG. 7 illustrates a UE operation for HARQ ACK transmission according toan embodiment of the disclosure;

FIG. 8 illustrates another UE operation for HARQ QCK transmissionaccording to an embodiment of the disclosure;

FIG. 9 is a block diagram showing the internal structure of a terminalaccording to an embodiment of the disclosure; and

FIG. 10 is a block diagram showing the internal structure of a basestation according to an embodiment of the disclosure.

DETAILED DESCRIPTION

Hereinafter, the operation principle of the disclosure will be describedin detail in conjunction with the accompanying drawings. In thefollowing description of the disclosure, a detailed description of knownfunctions or configurations incorporated herein will be omitted when itmay make the subject matter of the disclosure rather unclear. The termswhich will be described below are terms defined in consideration of thefunctions in the disclosure, and may be different according to users,intentions of the users, or customs. Therefore, the definitions of theterms should be made based on the contents throughout the specification.

In the following description, terms for identifying access nodes, termsreferring to network entities, terms referring to messages, termsreferring to interfaces between network entities, terms referring tovarious identification information, and the like are illustratively usedfor the sake of convenience. Therefore, the disclosure is not limited bythe terms as used below, and other terms referring to subjects havingequivalent technical meanings may be used.

In the following description, the disclosure uses terms and namesdefined in the 3rd generation partnership project long term evolution(3GPP LTE) standard, which is the latest standard among the existingcommunication standards, for the convenience of description. However,the disclosure is not limited by these terms and names, and may beapplied in the same way to systems that conform other standards. Inparticular, the disclosure may be applied to 3GPP new radio (NR: 5thmobile communication standard).

Wireless communication systems, which provided voice-oriented servicesin early stages, have evolved into broadband wireless communicationsystems that provide high-speed and high-quality packet data servicesaccording to communication standards such as high-speed packet access(HSPA) of 3GPP, long term evolution (LTE or evolved universalterrestrial radio access (E-UTRA)), LTE-advanced (LTE-A), LTE-Pro,high-rate packet data (HRPD) of 3GPP2, ultra-mobile broadband (UMB), andIEEE 802.16e.

In an LTE system, which is a representative example of a broadbandwireless communication system, the downlink (DL) adopts an orthogonalfrequency-division multiplexing (OFDM) scheme, and the uplink (UL)adopts a single-carrier frequency-division multiple access (SC-FDMA)scheme. The uplink is a radio link through which a terminal (a userequipment (UE)) or a mobile station (MS)) transmits data or a controlsignal to a base station (eNode B or BS), and the downlink is a radiolink through which a base station transmits data or a control signal toa UE. In the multiple-access scheme described above, data or controlinformation of each user is distinguished by performing allocation andoperations such that time-frequency resources for carrying the data orcontrol information for each UE do not overlap each other, that is, suchthat orthogonality is established.

As a future communication system after LTE, that is, a 5G communicationsystem needs to freely reflect the various requirements of a user, aservice provider, and the like, and thus services simultaneouslysatisfying the various requirements need to be supported. Services beingconsidered for the 5G communication system include enhanced mobilebroadband (eMBB) communication, massive machine-type communication(mMTC), ultra-reliability low-latency communication (URLLC), and thelike.

The eMBB aims to provide a further enhanced data rate compared to thedata rate supported by the existing LTE, LTE-A or LTE-Pro. For example,in the 5G communication system, the eMBB needs to support, from theviewpoint of one base station, a peak data rate of 20 Gbps in thedownlink and a peak data rate of 10 Gbps in the uplink. In addition, the5G communication system needs to provide an increased user-perceiveddata rate of a UE while providing the peak data rate. In order tosatisfy these requirements, the 5G communication system requires variousenhanced transmission or reception technologies including furtherenhanced multi-input multi-output (MIMO) transmission technology.Further, the LTE system transmits a signal using a 20 MHz maximumtransmission bandwidth in the 2 GHz band. In contrast, the 5Gcommunication system transmits a signal using a frequency bandwidthwider than 20 MHz in a frequency band of 3 to 6 GHz or in a frequencyband higher than 6 GHz, and thus can satisfy the data rates necessaryfor the 5G communication system.

Further, in the 5G communication system, mMTC is being considered forimplementation in order to support application services, such as thoserelated to the Internet of Things (IoT). In order for mMTC toefficiently support the IoT, support for access by a large number of UEswithin a cell, coverage improvement of a UE, increased battery lifetime,and a reduction in the cost of a UE are required. The IoT connectsvarious sensors and various devices to provide a communication function,and thus needs to support a large number of UEs (e.g., 1,000,000UEs/km²) within a cell. Furthermore, a UE supporting mMTC requires widercoverage compared to other services provided by the 5G communicationsystem because there is a good possibility that the UE may be located ina shadow area not covered by a cell, such as the underground of abuilding. A UE supporting mMTC needs to be configured as a cheap UE, andrequires a very long battery life time, such as 10 to 15 years, becauseit is difficult to frequently replace the battery of the UE.

Finally, URLLC is a mission-critical cellular-based wirelesscommunication service. The wireless communication service may beconsidered for implementation in remote control of robots or machinery,industrial automation, services used for unmanned aerial vehicles,remote health care, emergency alerts, and the like. Accordingly,communication provided by URLLC needs to satisfy requirements of verylow latency and very high reliability.

For example, a service supporting the URLLC needs to satisfy a wirelessaccess latency time (air interface latency) that is less than 0.5 ms,and also requires a packet error rate of 10⁻⁵ or less. Accordingly, forservice supporting URLLC, the 5G system needs to provide a transmissiontime interval (TTI) that is smaller than that of other services, andalso requires design for allocating resources in a wide frequency bandin order to secure reliability of a communication link.

Three services of the 5G system, namely, eMBB, URLLC, and mMTC, may bemultiplexed and transmitted in one system. In order to satisfy thedifferent requirements of the services, different transmission andreception schemes and parameters may be used between the services.

Hereinafter, the frame structure of the 5G system will be described inmore detail with reference to the drawings.

FIG. 1 illustrates the basic structure of a time-frequency domain, whichis a radio resource domain in which data or a control channel istransmitted in a 5G system.

Referring to FIG. 1 , a horizontal axis indicates a time domain, and avertical axis indicates a frequency domain. The basic unit of thetime-frequency domain is a resource element (RE) 101, and the RE may bedefined by 1 orthogonal frequency-division multiplexing (OFDM) symbol102 on the time domain and 1 subcarrier 103 on the frequency domain. Inthe frequency domain, N_(sc) ^(RB) (e.g., 12) consecutive REs mayconfigure one resource block (RB) 104.

Hereinafter, a slot structure considered for implementation in the 5Gsystem will be described. The resource structure considered forimplementation in the 5G system may include a frame, a subframe 201, anda slot 202.

1 frame may be defined by 10 ms. 1 subframe may be defined by 1 ms, andthus 1 frame may be configured by a total of 10 subframes. 1 slot may bedefined by 14 OFDM symbols (i.e., the number of symbols per slot(N_(symb) ^(slot))=14). 1 subframe may be configured by one or multipleslots, and the number of slots per subframe may differ depending on theconfiguration value μ 204 and 205 for the subcarrier interval. Forexample, the case where μ=0 and the case where μ=1 are assumed to besubcarrier interval configuration values. In the case where μ=0, 1subframe may be configured by 1 slot, and in the case where μ=1, 1subframe may be configured by two slots. That is, the number of slots(N_(slot) ^(subframe,μ)) per subframe may differ according to theconfiguration value for the subcarrier interval, and thus the number ofslots (N_(slot) ^(frame,μ)) per frame may differ. N_(slot) ^(subframe,μ)and N_(slot) ^(frame,μ) according to each subcarrier spacingconfiguration may be defined as in <Table 1> below.

TABLE 1 μ N_(symb) ^(slot) N_(slot) ^(frame,μ) N_(slot) ^(subframe,μ) 014 10 1 1 14 20 2 2 14 40 4 3 14 80 8 4 14 160 16 5 14 320 32

Next, DCI in the 5G system will be described in detail.

In the 5G system, scheduling information for uplink data (or a physicaluplink shared channel (PUSCH)) or downlink data (or a physical downlinkshared channel (PDSCH)) is transmitted from a base station to a UEthrough DCI. In the disclosure, an operation of transmitting orreceiving data through an uplink or downlink data channel may beexpressed as transmitting an uplink or downlink data channel. Further,an operation of transmitting or receiving control information through anuplink or downlink control channel may be expressed as transmitting anuplink or downlink data channel.

The UE may monitor a DCI format for fallback and a DCI format fornon-fallback for PUSCH or PDSCH. The DCI format for fallback may beconfigured by fixed fields defined in advance between the base stationand the UE, and the DCI format for non-fallback may include aconfigurable field.

The fallback DCI for scheduling the PUSCH may include, for example, thefollowing pieces of information.

TABLE 2 Identifier for DCI formats (DCI format identifier)- [1] bitFrequency   domain   resource   assignment    [ ┌log₂ (N_(RB) ^(UL,BWP)(N_(RB) ^(UL,BWP) + 1) / 2)┐ ] bits Time domain resource assignment - Xbits Frequency hopping flag - 1 bit. Modulation and coding scheme - 5bits New data indicator - 1 bit Redundancy version - 2 bits Hybridautomatic repeat request (HARQ) process number - 4 bits TPC command forscheduled PUSCH (wherein TPC indicates transmit power control) - 2 bitsUL/supplementary uplink (SUL) indicator - 0 or 1 bit

The non-fallback DCI for scheduling the PUSCH may include, for example,the following pieces of information.

TABLE 3  Carrier indicator - 0 or 3 bits Identifier for DCI formats -[1] bits Bandwidth part indicator - 0, 1 or 2 bits Frequency domainresource assignment For resource allocation type 0, ┌N_(RB) ^(UL,BWP)/P┐bits For resource allocation type 1, ┌log₂(N_(RB) ^(UL,BWP)(N_(RB)^(UL,BWP) + 1)/2┐ bits Time domain resource assignment -1, 2, 3, or 4bits VRB-to-PRB mapping - 0 or 1 bit, only for resource allocationtype 1. 0 bit if only resource allocation type 0 is configured; 1 bitotherwise. Frequency hopping flag - 0 or 1 bit, only for resourceallocation type 1. 0 bit if only resource allocation type 0 isconfigured; 1 bit otherwise. Modulation and coding scheme - 5 bits Newdata indicator - 1 bit Redundancy version - 2 bits HARQ process number -4 bits 1st downlink assignment index - 1 or 2 bits 1 bit for semi-staticHARQ-ACK codebook; 2 bits for dynamic HARQ-ACK codebook with singleHARQ-ACK codebook. 2nd downlink assignment index - 0 or 2 bits 2 bitsfor dynamic HARQ-ACK codebook with two HARQ-ACK sub- codebooks; 0 bitotherwise. TPC command for scheduled PUSCH - 2 bits${{SRS}{resource}{indicator}} - {\left\lceil {\log_{2}\left( {\sum\limits_{k = 1}^{L_{{ma}x}}\begin{pmatrix}N_{SRS} \\k\end{pmatrix}} \right)} \right\rceil{or}\left\lceil {\log_{2}\left( N_{SRS} \right)} \right\rceil{bits}}$$\left\lceil {\log_{2}\left( {\sum\limits_{k = 1}^{L_{{ma}x}}\begin{pmatrix}N_{SRS} \\k\end{pmatrix}} \right)} \right\rceil{bits}{for}{non} - {codebook}{based}{PUSCH}$transmission; ┌log₂(N_(SRS))┐ bits for codebook based PUSCHtransmission. Precoding information and number of layers-up to 6 bitsAntenna ports- up to 5 bits SRS request- 2 bits CSI request - 0, 1, 2,3, 4, 5, or 6 bits CBG transmission information- 0, 2, 4, 6, or 8 bitsPTRS-DMRS association - 0 or 2 bits. beta_offset indicator- 0 or 2 bitsDMRS sequence initialization- 0 or 1 bit UL/SUL indicator - 0 or 1 bit

The fallback DCI for scheduling the PDSCH may include, for example, thefollowing pieces of information.

TABLE 4 Identifier for DCI formats - [1] bit Frequency domain resourceassignment -[ ┌log₂ (N_(RB) ^(DL,BWP) (N_(RB) ^(DL,BWP) +1) /2) ┐ ] bitsTime domain resource assignment - X bits VRB-to-PRB mapping - 1 bit.Modulation and coding scheme - 5 bits New data indicator - 1 bitRedundancy version - 2 bits HARQ process number - 4 bits Downlinkassignment index - 2 bits TPC command for scheduled PUCCH - [2] bitsPUCCH resource indicator - 3 bits PDSCH-to-HARQ feedback timingindicator - [3] bits

The non-fallback DCI for scheduling the PDSCH may include, for example,the following information.

TABLE 5 Carrier indicator - 0 or 3 bits Identifier for DCI formats - [1]bits Bandwidth part indicator - 0, 1 or 2 bits Frequency domain resourceassignment     For resource allocation type 0, ┌N_(RB) ^(DL,BWP) / P┐bits     For resource allocation type 1, ┌log₂ (N_(RB) ^(DL,BWP) (N_(RB)^(DL,BWP) +1) / 2)┐ bits Time domain resource assignment - 1, 2, 3, or 4bits VRB-to-PRB mapping - 0 or 1 bit, only for resource allocationtype 1.     0 bit if only resource allocation type 0 is configured;    1 bit otherwise. PRB bundling size indicator - 0 or 1 bit Rate matchingindicator- 0, 1, or 2 bits ZP CSI-RS trigger - 0, 1, or 2 bits Fortransport block 1: Modulation and coding scheme - 5 bits New dataindicator - 1 bit Redundancy version - 2 bits For transport block 2:Modulation and coding scheme - 5 bits New data indicator - 1 bitRedundancy version - 2 bits HARQ process number - 4 bits Downlinkassignment index - 0 or 2 or 4 bits TPC command for scheduled PUCCH - 2bits PUCCH resource indicator - 3 bits PDSCH-to-HARQ_feedback timingindicator - 3 bits Antenna ports - 4, 5 or 6 bits Transmissionconfiguration indication- 0 or 3 bits SRS request - 2 bits CBGtransmission information - 0, 2, 4, 6, or 8 bits CBG flushing outinformation- 0 or 1 bit DMRS sequence initialization - 1 bit

The DCI may be transmitted through a physical downlink control channel(PDCCH) after performing a channel-coding and modulation process. Acyclic redundancy check (CRC) is attached to a DCI message payload, andthe CRC is scrambled using a radio network temporary identifier (RNTI)corresponding to the identification of the UE.

Different RNTIs are used depending on the objective of a DCI message,for example, UE-specific data transmission, a power control command, ora random access response. That is, the RNTI is not explicitlytransmitted, but is included in a CRC calculation process andtransmitted. When a DCI message transmitted on a PDCCH is received, a UEidentifies a CRC using an allocated RNTI, and if CRC results arecorrect, the UE may be made aware that the corresponding message hasbeen transmitted to the UE.

For example, DCI scheduling a PDSCH for system information (SI) may bescrambled using an SI-RNTI. The DCI scheduling a PDSCH for a randomaccess response (RAR) message may be scrambled using an RA-RNTI. The DCIscheduling a PDSCH for a paging message may be scrambled using a P-RNTI.DCI providing notification of a slot format indicator (SFI) may bescrambled using an SFI-RNTI. DCI providing notification of a transmitpower control (TPC) may be scrambled using a TPC-RNTI. DCI forscheduling the UE-specific PDSCH or PUSCH may be scrambled using a cellRNTI (C-RNTI).

Hereinafter, a method for configuring a rate-matching resource with thegoal of performing rate matching in a 5G communication system will bedescribed. Rate matching refers to an operation of adjusting themagnitude of a signal by considering the amount of resources required totransmit the signal. For example, rate matching of a data channel refersto an operation in which the amount of data is adjusted without mappingor transmitting a data channel with respect to specific time andfrequency resource domains.

FIG. 2 illustrates an example of rate matching for a data channel in 5G.

FIG. 2 illustrates a downlink data channel 201 and a rate-matchingresource 202. A base station may configure one or multiple rate-matchingresources 202 in a UE via higher layer signaling (e.g., RRC signaling).

Configuration information of the rate-matching resource 202 may includetime-domain resource allocation information 203, frequency-domainresource allocation information 204, and period information 205.Hereinafter, a bitmap corresponding to the frequency-domain resourceallocation information 204 is referred to as a “first bitmap”, a bitmapcorresponding to the time-domain resource allocation information 203 isreferred to as a “second bitmap”, and a bitmap corresponding to theperiod information 205 is referred to as a “third bitmap”.

If all or some of the time and frequency resources of the scheduled datachannel 201 overlap the configured rate-matching resource 202, the basestation may perform rate matching for the data channel 201 in therate-matching resource 202 part and transmit the same. A UE may performreception and decoding under the assumption that rate matching for thedata channel 201 has been performed in the rate-matching resource 202part.

The base station may dynamically notify the UE whether to perform ratematching for the data channel in the configured rate-matching resourcepart, through additional configuration, through the DCI. Specifically,the base station may select some of the configured rate-matchingresources and group the selected rate-matching resources into arate-matching resource group, and may indicate to the UE whether a datachannel has been rate-matched with respect to each rate-matchingresource group, through the DCI, using a bitmap method.

For example, if four rate-matching resources RMR #1, RMR #2, RMR #3, andRMR #4 have been configured, the base station may configure RMG #1={RMR#1, RMR #2} and RMG #2={RMR #3, RMR #4} as rate-matching groups, and mayindicate to the UE whether rate matching in each of RMG #1 and RMG #2has been performed using 2 bits in the DCI field in the form of abitmap. For example, if rate matching needs to be performed, a bit inthe DCI field is configured as “1”, and if rate matching does not needto be performed, the bit in the DCI field is configured as “0” so as toindicate whether or not rate matching has been performed.

An indicator indicating whether a data channel has been rate-matchedwith respect to a rate-matching resource group is referred to as a“rate-matching indicator”.

Hereinafter, a method for scheduling a data channel in a 5Gcommunication system will be described.

FIG. 3 illustrates an example of multi-slot scheduling supported by 5G.

A base station may quasi-statically configure, in a UE, an aggregationfactor 304 for data channel scheduling via higher layer signaling (e.g.,RRC signaling). The aggregation factor 304 may have values of 1, 2, 4,8, for example. The base station may notify the UE of schedulinginformation for a data channel through the DCI, and the UE may obtainfinal scheduling information for the data channel by combining thescheduling information received through the DCI and information of theconfigured aggregation factor 304.

FIG. 3 shows an example in which the aggregation factor 304 isconfigured as 4 with respect to a downlink data channel 302. The basestation may indicate, to a UE, information on scheduling 303 for thedownlink data channel 302 through the downlink control channel 301. TheUE may receive data through the data channel 302 under the assumptionthat the scheduling information for the data channel 302, receivedthrough the DCI, is repeated as many times as the configured aggregationfactor 304. For example, when the aggregation factor 304 is 4, the basestation may transmit data through the downlink data channel 302 in fourslots.

Hereinafter, a method for configuring a bandwidth part considered forimplementation in a 5G communication system will be described.

FIG. 4 illustrates an example of configuration of a bandwidth part in a5G communication system.

Referring to FIG. 4 , an example in which a UE bandwidth 400 part isconfigured by two bandwidth parts, that is, bandwidth part #1 401 andbandwidth part #2 402, is shown. The base station may configure one or aplurality of bandwidth parts in a UE, and may configure the followingpieces of information for each bandwidth part.

TABLE 6 Configuration information 1. A bandwidth of a bandwidth part(the number of PRBs configuring a bandwidth part) Configurationinformation 2. Frequency location of a bandwidth part (an offset valuein comparison with a reference point, and the reference point may be,for example, the center frequency of the carrier, a synchronizationsignal, a synchronization signal raster, etc.) Configuration information3. Numerology of a bandwidth part (for example, subcarrier spacing, alength of a cyclic prefix (CP), etc.) Otherwise

In addition to the configuration information described above, variousparameters related to the bandwidth part may be configured in the UE.The information described above may be transmitted by the base stationto the UE via higher layer signaling, for example, RRC signaling.

At least one bandwidth part among the configured one or multiplebandwidth parts may be activated. Whether the configured bandwidth parthas been activated may be semi-statically transmitted via RRC signalingfrom the base station to the UE, or may be dynamically transmittedthrough a MAC CE or DCI.

The configuration of a bandwidth part supported by 5G may be used forvarious objectives.

For example, in the case in which the bandwidth supported by the UE issmaller than the system bandwidth, signal transmission or reception maybe performed in the bandwidth supported by the UE through theconfiguration of the bandwidth part. For example, in <Table 6>, thefrequency location (configuration information 2) of the bandwidth partis configured in the UE, and thus the UE may transmit or receive data ata specific frequency location within the system bandwidth.

According to another example, with the goal of supporting differentnumerologies, the base station may configure multiple bandwidth parts inthe UE. For example, in order to provide support for data transmissionor reception using a subcarrier spacing of 15 kHz and a subcarrierspacing of 30 kHz to an arbitrary UE, two bandwidth parts may beconfigured to use subcarrier spacings of 15 kHz and 30 kHz,respectively. Different bandwidth parts may be subject tofrequency-division multiplexing (FDM), and in the case of trying totransmit or receive data at a specific subcarrier interval, a bandwidthpart configured at corresponding subcarrier intervals may be activated.

According to another example, with the goal of reducing the amount ofpower consumed by the UE, the base station may configure a bandwidthpart having different bandwidths in the UE. For example, in the case inwhich the UE supports a very large bandwidth, for example, a bandwidthof 100 MHz, and always transmits or receives data through thecorresponding bandwidth, high large power consumption may result. Inparticular, in the situation in which there is no traffic, unnecessarymonitoring of a downlink control channel for a large bandwidth of 100MHz by the UE may be very inefficient in terms of power consumption.Therefore, with the goal of reducing the power consumption by the UE,the base station may configure, in the UE, a bandwidth partcorresponding to a relatively small bandwidth, for example, a bandwidthpart of 20 MHz. In the situation where there is no traffic, the UE mayperform a monitoring operation in a 20 MHz bandwidth part, and in thecase where there is data, the UE may transmit or receive data using 100MHz bandwidth part according to the instructions of the base station.

Hereinafter, embodiments of the disclosure will be described in detailtogether with the accompanying drawings. Hereinafter, an embodiment ofthe disclosure will be described using the 5G system as an example, butthe embodiment of the disclosure may be applied to other communicationsystems having similar technical backgrounds or channel types. Forexample, LTE or LTE-A mobile communication and mobile communicationtechnology developed subsequent to 5G may be included in the embodimentsof the disclosure. Therefore, embodiments of the disclosure may beapplied to other communication systems through some modifications withina range that does not depart from the scope of the disclosure, asdetermined by a person skilled in the art.

In addition, if a detailed description of a related function orconfiguration is determined to unnecessarily obscure the subject matterof the disclosure, the detailed description will be omitted. Inaddition, terms to be described later are terms defined in considerationof their functions in the disclosure, and may vary according to a user'sor operator's intention or practice. Therefore, the definition of theterms should be made based on the contents throughout the specification.

First Embodiment

A base station may configure one or multiple rate-matching resources(RMR) via higher layer signaling (e.g., system information or RRCsignaling) in a UE. The rate-matching resource configuration informationmay include frequency-domain resource allocation information (a firstbitmap), time-domain resource allocation information (a second bitmap),and periodic information (a third bitmap).

The base station may select some of the additionally configuredrate-matching resources and group the selected resources into a resourceset group (RSG), and may indicate to the UE whether the data channel hasbeen rate-matched with respect to time and frequency resources includedin each resource set group (i.e., a union domain of rate-matchingresources existing in the group) through DCI using a bitmap method.

For example, when there are N resource set groups, the base station maynotify the UE whether rate matching has been performed in each resourceset group in the form of an N-bit bitmap. Specifically, for example, iffour rate-matching resources RMR #1, RMR #2, RMR #3, and RMR #4 areconfigured, the base station may configure RSG #1={RMR #1, RMR #2} andRSG #2={RMR #3, RMR #4} as resource set groups, and may indicate to theUE whether rate matching for the downlink data channel has beenperformed in the time and frequency resources included in each of RSG #1and RSG #2 in a bitmap method.

In a process of performing the rate matching operation, if rate-matchingresources configured by different period information (a third bitmap)are grouped into one resource set group, the rate-matching resourcedomain included in the resource set group may differ over time (for eachslot). This will be described in detail with reference to the drawings.

FIG. 5 illustrates an example of a rate-matching operation consideredfor implementation in 5G according to an embodiment of the disclosure.

Referring to FIG. 5 , two rate-matching resources RMR #1 501 and RMR #2502 are shown in FIG. 5 , and RMR #1 501 and RMR #2 502 are grouped andconfigured as a resource set group 503. Whether or not rate matching fora PDSCH 504 in the resource set group 503 has been performed may beindicated to the UE through the DCI through a rate-matching indicator505.

FIG. 5 shows the case in which rate-matching resources in the resourceset group 503 are configured with different periods. In FIG. 5 , period#1 506 of RMR #1 501 is configured as one slot, and period #2 507 of RMR#2 502 is configured as two slots. In this case, at the time point ofreceiving the rate-matching indicator 505, whether or not the actualrate-matching resource exists in the resource set group 503 may differ.For example, both RMR #1 501 and RMR #2 502 may exist in slot #0 508,but only RMR #1 501 may exist in slot #1 509. Therefore, when therate-matching indicator 505 is received, a method of determining whetherto perform rate matching for the resource set group 503 is additionallyrequired.

This is especially important when multi-slot scheduling for PDSCH 504has been performed. FIG. 5 shows the case where multi-slot scheduling inwhich the aggregation factor corresponds to four slots is performed forthe PDSCH 504. Here, the rate-matching indicator 505 for the resourceset group 503 may be transmitted only once through the DCI schedulingthe PDSCH 504, and the rate matching for the PDSCH 504 depending on thecorresponding rate-matching indicator 505 may be identically applied toall slots in which the PDSCH 504 has been scheduled. That is, in theexample of FIG. 5 , when the PDSCH 504 has been scheduled for slot #0508, slot #1 509, slot #2 510, and slot #3 511, the rate-matchingindicator 505 is indicated in slot #0 508, the same rate-matchingoperation may be applied to slot #0 508, slot #1 509, slot #2 510, andslot #3 511. Here, whether or not the actual rate-matching resourceexists in the resource set group 503 in each slot may differ dependingon period information of each rate-matching resource, and accordingly, aresource in each slot needs to be determined in order to perform ratematching for the PDSCH 504.

(1-1)th Embodiment

In a method of determining whether to perform rate matching for thePDSCH, if rate-matching resources configured with different periodinformation (a third bitmap) are grouped into one resource set group andthe rate-matching indicator for the resource set group is transmitted,rate matching can be performed only for an actually valid rate-matchingresource at a time point (a specific slot) at which the content of therate-matching indicator is applied in consideration of individual periodinformation of each of rate-matching resources in the resource setgroup. That is, a time or frequency resource domain included in aresource set group in slot n may be considered as a domain ofrate-matching resources actually existing in slot n, and whether thePDSCH is rate-matched in the corresponding domain may be determinedaccording to the rate-matching indicator.

This will be specifically described with reference to the drawings. Inthe method of determining whether to perform rate matching for the PDSCH504 in FIG. 5 , in the situation in which the PDSCH 504 has beenscheduled for slot #0 508, slot #1 509, slot #2 510, and slot #3 511 andthe rate-matching indicator 505 transmitted in slot #0 508 indicates toperform rate matching for the resource set group 503, according to the(1-1)th embodiment, the UE may consider individual period information ofRMR #1 501 and RMR #2 502, and thus may assume rate matching for aresource domain obtained by combining RMR #1 501 and RMR #2 502 in slot#0 508 and slot #2 510 and assume rate matching for a resource domain ofRMR #1 501 in slot #1 509 and slot #3 511

(1-2)th Embodiment

In the method of determining whether to perform rate matching for thePDSCH, if rate-matching resources configured with different periodinformation (a third bitmap) have been grouped into one resource setgroup and the rate-matching indicator for the resource set group istransmitted, the same period P may be applied to all rate-matchingresources existing in the resource set group to determine arate-matching resource at the time point (specific slot) at which ratematching is applied according to the rate-matching indicator. That is,with respect to all rate-matching resources which are grouped into aresource set group, the UE may ignore period information which has beenpreviously configured and apply a new period P. Accordingly, the UE maydetermine a time or frequency resource included in the resource setgroup in slot n. That is, it is assumed that all rate-matchingresources, which are grouped into a resource set group, exist at a timepoint at which the corresponding resource set group exists according toa new period P, and accordingly the UE may determine a rate-matchingresource for the PDSCH.

The method of determining a period P applied to the resource set groupmay be based on the following methods.

[Method 1]

P may be determined by the smallest period value among periods of allrate-matching resources existing in the resource set group. That is, ifthere are a total of N rate-matching resources RMR #1, RMR #2 . . . ,and RMR #N in the resource set group, and the periods thereof are P1, P2. . . , and PN respectively, P may correspond to the period having thesmallest value, among P1, P2, . . . , and PN.

[Method 2]

P may be determined as the period having a value corresponding to thegreatest common factor of period values of all rate-matching resourcesexisting in the resource set group. That is, if a total of Nrate-matching resources RMR #1, RMR #2 . . . , and RMR #N exist in theresource set group, and the periods thereof are P1, P2 . . . , and PNrespectively, P may correspond to the period having the valuecorresponding to the greatest common factor among periods P1, P2, . . ., and PN.

[Method 3]

P may correspond to one slot.

[Method 4]

The base station may additionally configure the P value in the UE viahigher layer signaling (e.g., RRC signaling).

This will be specifically described with reference to the drawings.

FIG. 6 illustrates another example of a rate-matching operationaccording to an embodiment of the disclosure.

Referring to FIG. 6 , in the method of determining whether to performrate matching for a PDSCH 604,

If RMR #1 601 is configured as period #1 606 corresponding to one slot,RMR #2 602 is configured as period #2 607 corresponding to two slots,and RMR #1 601 and RMR #2 602 are grouped into a resource set group 603,the UE may apply period P (in the example of FIG. 6 , P corresponds toone slot) to both RMR #1 601 and RMR #2 602 to determine a resourcedomain included in the resource set group. That is, RMR #2 602 does notactually exist in slot #1 609 and slot #3 611, but the UE may assumethat RMR #2 602 exists and consider the same as a rate-matchingresource.

According to the operation described above, in the situation in whichthe PDSCH 604 is scheduled for slot #0 608, slot #1 609, slot #2 610,and slot #3 611, and the rate-matching indicator 605 transmitted in slot#0 608 indicates to perform rate matching for the resource set group603, the period P (=one slot) is applied to RMR #1 601 and RMR #2 602and thus rate matching may be performed for a resource domain obtainedby combining RMR #1 601 and RMR #2 602 in all of slot #0 608, slot #1609, slot #2 610, and slot #3 611.

Second Embodiment

In 5G, a base station may configure one or multiple bandwidth parts(BWP) in a UE. In frequency-division duplexing (FDD), a downlinkbandwidth part and an uplink bandwidth part may be individuallyconfigured. In time-division duplexing (TDD), a pair of a downlinkbandwidth part and an uplink bandwidth part may be configured. Onebandwidth part among the configured downlink/uplink bandwidth parts maybe activated. Whether or not the configured bandwidth part has beenactivated may be semi-statically transmitted from the base station tothe UE through RRC signaling, or may be dynamically transmitted throughDCI.

The base station may dynamically indicate a change in the bandwidth partby transmitting a bandwidth part index to be activated to the UE throughthe DCI. A bandwidth part index indicator may be transmitted throughdownlink scheduling DCI or uplink scheduling DCI. In FDD, the downlinkbandwidth part may be dependent on a bandwidth part index, indicated bythe downlink scheduling DCI, and the uplink bandwidth part may dependenton a bandwidth part index indicated by the uplink scheduling DCI. InTDD, since a pair of the uplink bandwidth part and the downlinkbandwidth part is configured, the bandwidth part index indicated by theuplink or downlink scheduling DCI may indicate a change in the uplinkand downlink bandwidth part pair.

In a carrier aggregation environment, the UE may transmit HARQ-ACK fordata, which is transmitted through a PDSCH in a secondary cell (Scell),through a physical uplink control channel (PUCCH) of a primary cell(Pcell). Here, the uplink bandwidth part of the Pcell may be changedbetween the time point t1 at which the scheduling DCI for the PDSCH ofthe Scell is received and the time point t2 at which the HARQ-ACK forthe PDSCH is transmitted. Here, if the PUCCH resource for originallyintending to transmit the HARQ-ACK of the Scell cannot be used as it isdue to the change in the bandwidth part of the Pcell, an operation oftransmitting the HARQ-ACK needs to be defined. In the situationdescribed above, a method of transmitting HARQ-ACK for the PDSCH of theScell may be performed based on the following operations.

For the sake of easy explanation, the following terms are used.

-   -   t1: the time point at which the UE receives the scheduling DCI        for the PDSCH of the Scell    -   t2: the time point at which HARQ-ACK transmission for the PDSCH        of the Scell is performed

[Method 1]

FIG. 7 illustrates a UE operation for HARQ ACK transmission according toan embodiment of the disclosure.

In operation 701, if the UE switched the uplink bandwidth part of thePcell between the time point t1 and the time point t2, the UE maydetermine whether control information, which will be transmitted on aPUCCH at a time point t2 in the changed uplink bandwidth part of thePcell, exists in operation 702.

If there is control information to be transmitted through the PUCCH atthe time point t2, the UE multiplexes the control information, which istransmitted to the changed uplink bandwidth part of the Pcell, and anHARQ-ACK for the data transmitted through the Scell and transmits thecontrol information to a base station in operation 703.

If no control information to be transmitted exists, the UE may drop theHARQ-ACK of the Scell without transmitting the same in operation 704.

[Method 1]

FIG. 8 illustrates a UE operation for HARQ-ACK transmission according toan embodiment of the disclosure.

In operation 801, if the UE has switched the uplink bandwidth part ofthe Pcell between a time point t1 and a time point t2, the UE maydetermine whether a scheduled PUSCH exists at a time point t2 in thechanged uplink bandwidth part of the Pcell in operation 802.

If the scheduled PUSCH exists, the UE may multiplex data, which will betransmitted on the PUSCH in the changed uplink bandwidth part of thePcell, and the HARQ-ACK of the Scell and transmit the controlinformation to the base station in operation 803.

If no scheduled PUSCH exists, the UE may drop the HARQ-ACK of the Scellwithout transmitting the same in operation 804.

In order to perform the embodiments of the disclosure described above, atransmitter, a receiver, and a controller of a UE and a base station,respectively, are illustrated in FIGS. 9 and 10 . Here, a transmissionor reception method by a base station and a UE, respectively, isillustrated for applying a method for transmitting or receiving adownlink control channel and a data channel in a 5G communication systemcorresponding to the embodiments described above, and in order toperform the transmission or reception method, a transmitter, a receiver,and a processor of each of the base station and the UE need to operateaccording to the embodiment.

Specifically, FIG. 9 is a block diagram showing the internal structureof a UE according to an embodiment of the disclosure.

As shown in FIG. 9 , the UE of the disclosure may include a processor901, a receiver 902, and a transmitter 903.

The processor 901 may control a series of processes by which the UE mayoperate according to the embodiment of the disclosure described above.For example, the processor may control the rate-matching operation for adata channel and the HARQ-ACK transmission operation differentlyaccording to embodiments of the disclosure.

The receiver 902 and the transmitter 903 may be collectively referred toas a transceiver in an embodiment of the disclosure. The transceiver maytransmit or receive a signal. The signal may include control informationand data. To this end, the transceiver may include an RF transmitter forup-converting and amplifying the frequency of a transmitted signal, anRF receiver for low-noise amplifying a received signal anddown-converting the frequency, and the like. In addition, thetransceiver may receive a signal through a wireless channel, output thesignal to the processor 901, and transmit the signal output from theprocessor 901 through the wireless channel.

FIG. 10 is a block diagram showing the internal structure of a basestation according to an embodiment of the disclosure.

As shown in FIG. 10 , the base station of the disclosure may include aprocessor 1001, a receiver 1002, and a transmitter 1003.

The processor 1001 may control a series of processes by which the basestation may operate according to the embodiment of the disclosuredescribed above. For example, the processor may control therate-matching operation for a data channel and a HARQ-ACK receptionmethod differently according to embodiments of the disclosure.

The receiver 1002 and the transmitter 1003 may be collectively referredto as a transceiver in an embodiment of the disclosure. The transceivermay transmit or receive a signal to or from a UE. The signal may includecontrol information and data. To this end, the transceiver may includean RF transmitter for up-converting and amplifying the frequency of atransmitted signal, an RF receiver for low-noise amplifying a receivedsignal and down-converting the frequency, and the like. In addition, thetransceiver may receive a signal through a wireless channel, output thesignal to the processor 1001, and transmit the signal output from theprocessor 1001 through the wireless channel.

In the drawings in which methods of the disclosure are described, theorder of the description does not always correspond to the order inwhich steps of each method are performed, and the order relationshipbetween the steps may be changed or the steps may be performed inparallel.

Alternatively, in the drawings in which methods of the disclosure aredescribed, some elements may be omitted and only some elements may beincluded therein without departing from the essential spirit and scopeof the disclosure.

In the above-described detailed embodiments of the disclosure, anelement included in the disclosure is expressed in the singular or theplural according to presented detailed embodiments. However, thesingular form or plural form is selected appropriately to the presentedsituation for the convenience of description, and the disclosure is notlimited by elements expressed in the singular or the plural. Therefore,either an element expressed in the plural may also include a singleelement or an element expressed in the singular may also includemultiple elements.

The embodiments of the disclosure described and shown in thespecification and the drawings have been presented to easily explain thetechnical contents of the disclosure and help understanding of thedisclosure, and are not intended to limit the scope of the disclosure.That is, it will be apparent to those skilled in the art that othermodifications and changes may be made thereto on the basis of thetechnical spirit of the disclosure. Further, the above respectiveembodiments may be employed in combination, as necessary.

The invention claimed is:
 1. A method performed by a terminal in awireless communication system, the method comprising: receiving, from abase station, configuration information including information on anaggregation factor indicating a number of repetitions for data,information on a rate matching resource, and information on at least onerate matching group, each rate matching group including a plurality ofrate matching resources; receiving, from the base station, controlinformation for scheduling of a physical downlink shared channel(PDSCH), the control information including a rate matching indicatorindicating whether to rate match the PDSCH in each rate matching groupof the at least one rate matching group; and decoding the PDSCH which israte matched based on a rate matching group indicated by the ratematching indicator, wherein the rate matching indicator is applied to aset of slots where a union of rate matching resources included in therate matching group is present among slots of the scheduled PDSCH. 2.The method of claim 1, further comprising: identifying consecutive slotsin which the PDSCH is to be received, based on the information on theaggregation factor and the control information, wherein the slots of thescheduled PDSCH are the consecutive slots, and wherein the union of ratematching resources included in the rate matching group is not availablefor the PDSCH.
 3. The method of claim 1, wherein the information on therate matching resource includes information on a periodicity,information on a time resource, and information on a frequency resource.4. The method of claim 1, wherein a number of bits of the rate matchingindicator is determined based on a number of the at least one ratematching group, wherein each bit of the rate matching indicatorcorresponds to each rate matching group of the at least one ratematching group, and wherein the number of repetitions for data isconfigured to one of 1, 2, 4, and
 8. 5. The method of claim 1, whereinthe configuration information is received via a radio resource control(RRC) signaling, and wherein the control information is received on aphysical downlink control channel (PDCCH).
 6. A method performed by abase station in a wireless communication system, the method comprising:transmitting, to a terminal, configuration information includinginformation on an aggregation factor indicating a number of repetitionsfor data, information on a rate matching resource, and information on atleast one rate matching group, each rate matching group including aplurality of rate matching resources; transmitting, to the terminal,control information for scheduling of a physical downlink shared channel(PDSCH), the control information including a rate matching indicatorindicating whether to rate match the PDSCH in each rate matching groupof the at least one rate matching group; and transmitting, to theterminal, the data on the PDSCH which is rate matched based on a ratematching group indicated by the rate matching indicator, wherein therate matching indicator is applied to a set of slots where a union ofrate matching resources included in the rate matching group is presentamong slots of the scheduled PDSCH.
 7. The method of claim 6, whereinconsecutive slots in which the data on the PDSCH is transmitted aredetermined based on the information on the aggregation factor and thecontrol information, wherein the slots of the scheduled PDSCH are theconsecutive slots, and wherein the union of rate matching resourcesincluded in the rate matching group is not available for the PDSCH. 8.The method of claim 6, wherein the information on the rate matchingresource includes information on a periodicity, information on a timeresource, and information on a frequency resource.
 9. The method ofclaim 6, wherein a number of bits of the rate matching indicator isdetermined based on a number of the at least one rate matching group,wherein each bit of the rate matching indicator corresponds to each ratematching group of the at least one rate matching group, and wherein thenumber of repetitions for data is configured to one of 1, 2, 4, and 8.10. The method of claim 6, wherein the configuration information istransmitted via a radio resource control (RRC) signaling, and whereinthe control information is transmitted on a physical downlink controlchannel (PDCCH).
 11. A terminal in a wireless communication system, theterminal comprising: a transceiver; and a controller coupled with thetransceiver and configured to: receive, from a base station,configuration information including information on an aggregation factorindicating a number of repetitions for data, information on a ratematching resource, and information on at least one rate matching group,each rate matching group including a plurality of rate matchingresources, receive, from the base station, control information forscheduling of a physical downlink shared channel (PDSCH), the controlinformation including a rate matching indicator indicating whether torate match the PDSCH in each rate matching group of the at least onerate matching group, and decode the PDSCH which is rate matched based ona rate matching group indicated by the rate matching indicator, whereinthe rate matching indicator is applied to a set of slots where a unionof rate matching resources included in the rate matching group ispresent among slots of the scheduled PDSCH.
 12. The terminal of claim11, wherein the controller is further configured to identify consecutiveslots in which the PDSCH is to be received, based on the information onthe aggregation factor and the control information, wherein the slots ofthe scheduled PDSCH are the consecutive slots, and wherein the union ofrate matching resources included in the rate matching group is notavailable for the PDSCH.
 13. The terminal of claim 11, wherein theinformation on the rate matching resource includes information on aperiodicity, information on a time resource, and information on afrequency resource.
 14. The terminal of claim 11, wherein a number ofbits of the rate matching indicator is determined based on a number ofthe at least one rate matching group, wherein each bit of the ratematching indicator corresponds to each rate matching group of the atleast one rate matching group, and wherein the number of repetitions fordata is configured to one of 1, 2, 4, and
 8. 15. The terminal of claim11, wherein the configuration information is received via a radioresource control (RRC) signaling, and wherein the control information isreceived on a physical downlink control channel (PDCCH).
 16. A basestation in a wireless communication system, the base station comprising:a transceiver; and a controller coupled with the transceiver andconfigured to: transmit, to a terminal, configuration informationincluding information on an aggregation factor indicating a number ofrepetitions for data, information on a rate matching resource, andinformation on at least one rate matching group, each rate matchinggroup including a plurality of rate matching resources; transmit, to theterminal, control information for scheduling of a physical downlinkshared channel (PDSCH), the control information including a ratematching indicator indicating whether to rate match the PDSCH in eachrate matching group of the at least one rate matching group; andtransmit, to the terminal, the data on the PDSCH which is rate matchedbased on a rate matching group indicated by the rate matching indicator,wherein the rate matching indicator is applied to a set of slots where aunion of rate matching resources included in the matching group ispresent among slots of the scheduled PDSCH.
 17. The base station ofclaim 16, wherein consecutive slots in which the data on the PDSCH istransmitted are determined based on the information on the aggregationfactor and the control information, wherein the slots of the scheduledPDSCH are the consecutive slots, and wherein a union of all resourcesindicated in the rate matching group is not available for the PDSCH. 18.The base station of claim 16, wherein the information on the ratematching resource includes information on a periodicity, information ona time resource, and information on a frequency resource.
 19. The basestation of claim 16, wherein a number of bits of the rate matchingindicator is determined based on a number of the at least one ratematching group, wherein each bit of the rate matching indicatorcorresponds to each rate matching group of the at least one ratematching group, and wherein the number of repetitions for data isconfigured to one of 1, 2, 4, and
 8. 20. The base station of claim 16,wherein the configuration information is transmitted via a radioresource control (RRC) signaling, and wherein the control information istransmitted on a physical downlink control channel (PDCCH).